Charles e



O. E. SGRIBNER. MAGNETO ELECTRIC MACHINE.

(No Model.)

No. 427,122. Patented May 6, 1890.

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UNITED STATES PATENT CEEICE.

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE \VESTERN ELECTRIC COMPANY, OF SAME PLACE.

MAGNETO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 427,122, dated May 6, 1890.

Application filed December 27, 1886. Serial No. 222,709. (No model.)

To aZZ whom, it may c07wc7'n: ings in the frame I), and may be driven by any Be it known that I, CHARLES E. SCRIBNER, suitable mechanism. I have shown a crank a citizen of the United States, residing at Chiprovided with a gear-wheel, which engages cage, in the county of Cook and State of Illiwith a pinion upon the shaft of the armature. 55

nois, have invented a certain new and useful The armature isplaced between the two poles Improvement in Magneto-Electric Machines, of permanent magnets 0, so that the current (Case 132,) of which the following is a full, induced in the coil will be first of one polarity clear, concise, and exact description, referand then of the other as the armature reence being had to the accompanying drawvolves. One end of the coil of the armature 60 IO ings, forming a part of this specification. may be connected permanently with theframe My invention relates to nn'igneto-electric bthrough bearing of the armature. The other machines, and its object is to enable the user end of the coil is led out, preferably as indito send current in reversals or intermittent cated in Fig. 1, through the pin (Z, which is current of one polarity, as he may desire. preferably countersunk in the commutator e 6 5 r 5 As to the state of the art prior to my inand insulated from the armature, as shown.

Vention reference is made to Letters Patent I provide two brushes f and g, which normally to Carey, No. 310,379, granted January (3,1885. rest upon the commutator. I cut away about In said patent an eccentric makes the conone-half of the portion of the commutator opnection with the spring to give the pulsations posite brush g, and the commutator is so ad- 70 of one polarity, while in my case half of the justed that current of one polarity only will commutator revolving under the spring acbe generated during the time that brush 9 is complishes the same result, but in a more perresting upon the remaining segment. The

feet and satisfactory manner. By providing portion of the commutator opposite brush f a commutator which is connected with one will rest constantly thereon, and when con- 75 end only of the wire upon the armature, and nected to line-current generated in reversals by placing in connection with that commutaby the armature will be sent by said brush to tor two brushes, one of which is constantly in line. The brush g, as before stated,however,

connection with the commutator and the other only comes in contact with the commutator intermittently in connection therewith, I am during about one-half of its revolution, and 8o 0 enabled to collect either alternating currents it is during that portion of the revolution that or intermittent currents of one polarity. By current of one polarity is being generated.

means of akey connected with the circuit and Therefore, when brush g only is connected having points which connect with one or the to line, current of one polarity only will be other of the brushes resting upon the coinsent to line, and this will be sent intermit- 85 3 5 mutator, I am enabled to send either current tently, since the circuit will be broken be in reversals or intermittent current of one potween the brush g and the commutator durlarity by pressing the key into one position ing about one-half of the revolution of the or the other. The arrangement of the key armature. Now by a circuit-breaker coin with the circuits is preferably such that one nected with these different brushes it is evi- 9 contact is required, the breaking of which or dent that current may be sent to line either the closing of which will give me one current of one polarity intermittently or current in or the other. reversals.

My invention is illustrated in the accompa- In magneto-clectric machines used in con nying drawings, in Whichnection with telephone call-boxes I prefer to 95 Figure 1 is a side elevation of a magneto connect the brushes to line in such manner electric machine with the permanent magnets that normally current in reversals will be broken away to show the armature, which is sent to line. By providing a key to open the in section. Fig. 2 is an end View of the same. circuit between brush f and the line I am en- Like parts are indicated by similar letters abled to send. current of one polarity onlyin- I00 of reference throughout the different figures. termittently over the line. This key h,I have The armature a is mounted upon its bearshown in Fi 1 with a push-button for opention of the armature, and during the other half of the revolution of the armature brush 9 only will be connected therewith, and hence current of one polarity only will be sent to line and this one polarity current will be sent intermittently.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The armature of a magneto-electric machine and its coil, one end of which is connected permanently with the frame and the other connected with the commutator, in combination with the brushes resting upon the commutator, part of said commutator being about one-half cut away, and a circuit-break ing device in the circuit of one of the brushes, whereby current in reversals or intermittent current of one polarity may be sent to line, according to the position of the said circuitbreaking device, substantially as and for the purpose specified.

2. The combination, with the commutator of a magneto-generator, of two brushes, part of the commutator being about one-half cut CHARLES E. SCRIBNER.

XVitnesscs:

GEORGE P. BARTON, WM. M. GILLER. 

